基于可再生白糊精和异氰酸酯三聚体的聚氨酯涂料。

Polyurethane Coatings Based on Renewable White Dextrins and Isocyanate Trimers.

机构信息

Macromolecular Chemistry and New Polymeric Materials, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.

Dutch Polymer Institute, P.O. Box 902, 5600 AX, Eindhoven, The Netherlands.

出版信息

Macromol Rapid Commun. 2019 May;40(10):e1800874. doi: 10.1002/marc.201800874. Epub 2019 Feb 7.

DOI:10.1002/marc.201800874

PMID:30730069

Abstract

The polyurethane industry is strongly dependent on fossil-based polyols and polyisocyanates. Developing novel sustainable polyols from valuable biobased building blocks is a first step toward strong and durable development. The synthesis and properties of PU films based on pristine and acylated white dextrins (AVEDEX W80) as polyol and an aliphatic, low-viscosity, solvent-free triisocyanate based on hexamethylene diisocyanate (trimer-Desmodur N3300) as crosslinker is reported. After optimizing several conditions, such as the reaction time, reaction temperature, amount of solvent, isocyanate index, and amount per surface area, it is possible to obtain smooth PU films with good thermal properties.

摘要

聚氨酯工业强烈依赖于基于化石的多元醇和多异氰酸酯。从有价值的生物基构建块中开发新型可持续的多元醇是实现坚固耐用发展的第一步。本文报道了基于原始和酰化白糊精（AVEDEX W80）作为多元醇和基于六亚甲基二异氰酸酯（三聚体-Desmodur N3300）的脂肪族、低粘度、无溶剂三异氰酸酯作为交联剂的 PU 膜的合成和性能。在优化了几个条件之后，如反应时间、反应温度、溶剂用量、异氰酸酯指数和单位表面积用量等，可以得到具有良好热性能的光滑的 PU 膜。